1. Saara Aalto's smoking gun

You'll remember Saara from 2016's X Factor and our Finnish favourite is back on our screens again - this time competing for her country.

Watch out for Aalto on a rotating board which looks like she's about to have someone throw knives at her while blindfolded.

She also has an amazing sparkler-come-firework gun which she fires towards the end of her allotted three minutes. All very dramatic... when it works. It's failed to fire off occasionally during rehearsal, so it will be interesting to see if it manages on the night.

The controversy has arisen because O'Shaughnessy's dancers tell a story of love and heartbreak - and they are both male.

O'Shaughnessy told BBC News: "From the very start we've said love is love - whether it's between two guys, two girls or a guy and a girl, so I think this is a really important decision."

Will this controversy and the added publicity play in Ireland's favour?

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Media captionEurovision street style: What fans are wearing in Lisbon

3. All the acts performing with their husbands or boyfriends

Image copyrightAndres PuttingImage caption
OK we get it Amaia and Alfred: you're in love

This year's Eurovision seems to be even more of a love-in than it is usually. Literally. The number of on-off stage romances seems particularly high.

One of the favourites, Madame Monsieur from France, are a real life Mrs and Mr Emilie Satt and Jean-Karl Lucas, who met in 2008 and have been married for three years.

Lithuania's Ieva Zasimauskaite sings an endearing song about finding the person to grow old with, only to finish the song meeting a tall, handsome stranger on a bridge. Cue her real-life actual husband.

And perhaps the most obvious pairing is Spain's Amaia and Alfred who spend the whole of their duet no more than three inches away from the other's face, and end the song with a kiss. They say they've been dating for several months. I say isn't this all a bit too soon?

5. The Vikings are coming...

...run.

Image copyrightAndres PuttingImage caption
There will be no village pillaging this time, I promise

Rasmussen may look, as some media have noted, like the lanky kid brother of Tormund Giantsbane from Game of Thrones, but the message he brings is peace. The song is all about laying down your sword and taking the Higher Ground (the name of the song).

It may not sound like the ingredients for a hit, but c'mon guys this is Eurovision. Trust me, the primordial sounds of this song are going to do well.